首页|期刊导航|中国地震研究(英文版)|Study on Integrated Recurrence Behaviors of Strong Earthquakes Along Entire Active Fault Zones in the Sichuan-Yunnan Region, China
中国地震研究(英文版)2003，Vol.17Issue(2)：145-159,15.
Study on Integrated Recurrence Behaviors of Strong Earthquakes Along Entire Active Fault Zones in the Sichuan-Yunnan Region, China
Study on Integrated Recurrence Behaviors of Strong Earthquakes Along Entire Active Fault Zones in the Sichuan-Yunnan Region, China
摘要
Abstract
Based on historical earthquake data, we use statistical methods to study integrated recurrencebehaviors of strong earthquakes along 7 selected active fault zones in the Sichuan-Yunnanregion. The results show that recurrences of strong earthquakes in the 7 fault zones displaynear-random, random and clustering behaviors. The recurrence processes are never quasi-periodic, and are neither strength-time nor time-strength dependent. The more independentsegments for strong earthquake rupturing a fault zone has, the more complicated thecorresponding recurrence process is. And relatively active periods and quiescent periods forearthquake activity occur alternatively. Within the active periods, the distribution ofrecurrence time intervals between earthquakes has relatively large discretion, and can bemodelled well by a Weibull distribution. The time distribution of the quiescent periods hasrelatively small discretion, and can be approximately described by some distributions as thenormal. Both the durations of the active periods and the numbers of strong earthquakes withinthe active periods vary obviously cycle by cycle, leading to the relatively active periods havingnever repeated quasi-periodically. Therefore, the prohabilistic assessment for middle- and long-term seismic hazard for entireties of active fault zones based on data of historical strongearthquakes on the fault zones still faces difficulty.关键词
Historical earthquake/Active fault zone/Recurrence interval/Probability distribution/The Sichuan-Ynnnan regionKey words
Historical earthquake/Active fault zone/Recurrence interval/Probability distribution/The Sichuan-Ynnnan region引用本文复制引用
Yi Guixi,Wen Xueze,Xu Xiwei..Study on Integrated Recurrence Behaviors of Strong Earthquakes Along Entire Active Fault Zones in the Sichuan-Yunnan Region, China[J].中国地震研究(英文版),2003,17(2):145-159,15.基金项目
This project was supported by the Development Plan of the State Key Fundamental Research (Grant No. G1998040701), China. This work was supported by the Projects of Development Plan of the State Key Fundamental Research, Mechanism and Forecast for Continen （Grant No. G1998040701）
